Sauna heater



FIG. 1 is a front perspective view of a sauna heater according to an embodiment of the present invention;

FIG. 2 is a side perspective view of the sauna heater of FIG. 1;

FIG. 3 is a side view of the sauna heater;

FIG. 4 is a top view of the sauna heater; and,

FIG. 5 is a rear elevation view of the sauna heater. 

The ornamental design for a sauna heater, as shown and described. 